chore: import upstream snapshot with attribution

extensions/csharp/.vscodeignore

@@ -0,0 +1,2 @@
+test/**
+cgmanifest.json

extensions/csharp/cgmanifest.json

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+{
+	"registrations": [
+		{
+			"component": {
+				"type": "git",
+				"git": {
+					"name": "dotnet/csharp-tmLanguage",
+					"repositoryUrl": "https://github.com/dotnet/csharp-tmLanguage",
+					"commitHash": "1381bedfb087c18aca67af8278050d11bc9d9349"
+				}
+			},
+			"license": "MIT",
+			"version": "0.1.0",
+			"description": "The file syntaxes/csharp.tmLanguage.json was derived from https://github.com/dotnet/csharp-tmLanguage"
+		}
+	],
+	"version": 1
+}

extensions/csharp/language-configuration.json

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+{
+	"comments": {
+		"lineComment": "//",
+		"blockComment": [
+			"/*",
+			"*/"
+		]
+	},
+	"brackets": [
+		[
+			"{",
+			"}"
+		],
+		[
+			"[",
+			"]"
+		],
+		[
+			"(",
+			")"
+		]
+	],
+	"autoClosingPairs": [
+		[
+			"{",
+			"}"
+		],
+		[
+			"[",
+			"]"
+		],
+		[
+			"(",
+			")"
+		],
+		{
+			"open": "'",
+			"close": "'",
+			"notIn": [
+				"string",
+				"comment"
+			]
+		},
+		{
+			"open": "\"",
+			"close": "\"",
+			"notIn": [
+				"string",
+				"comment"
+			]
+		}
+	],
+	"surroundingPairs": [
+		[
+			"{",
+			"}"
+		],
+		[
+			"[",
+			"]"
+		],
+		[
+			"(",
+			")"
+		],
+		[
+			"<",
+			">"
+		],
+		[
+			"'",
+			"'"
+		],
+		[
+			"\"",
+			"\""
+		]
+	],
+	"folding": {
+		"markers": {
+			"start": "^\\s*#region\\b",
+			"end": "^\\s*#endregion\\b"
+		}
+	},
+	"onEnterRules": [
+		// Add // when pressing enter from inside line comment
+		// We do not want to match /// (a documentation comment)
+		{
+			"beforeText": {
+				"pattern": "[^\/]\/\/[^\/].*"
+			},
+			"afterText": {
+				"pattern": "^(?!\\s*$).+"
+			},
+			"action": {
+				"indent": "none",
+				"appendText": "// "
+			}
+		},
+		// Add /// when pressing enter from anywhere inside a documentation comment.
+		// Documentation comments are not valid after non-whitespace.
+		{
+			"beforeText": {
+				"pattern": "^\\s*\/\/\/"
+			},
+			"action": {
+				"indent": "none",
+				"appendText": "/// "
+			}
+		},
+	]
+}

extensions/csharp/package.json

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+{
+  "name": "csharp",
+  "displayName": "%displayName%",
+  "description": "%description%",
+  "version": "1.0.0",
+  "publisher": "vscode",
+  "license": "MIT",
+  "engines": {
+    "vscode": "0.10.x"
+  },
+  "scripts": {
+    "update-grammar": "node ../node_modules/vscode-grammar-updater/bin dotnet/csharp-tmLanguage grammars/csharp.tmLanguage ./syntaxes/csharp.tmLanguage.json"
+  },
+  "categories": ["Programming Languages"],
+  "contributes": {
+	"configurationDefaults": {
+		"[csharp]": {
+			"editor.maxTokenizationLineLength": 2500
+		}
+	},
+    "languages": [
+      {
+        "id": "csharp",
+        "extensions": [
+          ".cs",
+          ".csx",
+          ".cake"
+        ],
+        "aliases": [
+          "C#",
+          "csharp"
+        ],
+        "configuration": "./language-configuration.json"
+      }
+    ],
+    "grammars": [
+      {
+        "language": "csharp",
+        "scopeName": "source.cs",
+        "path": "./syntaxes/csharp.tmLanguage.json",
+        "tokenTypes": {
+          "meta.interpolation": "other"
+        }
+      }
+    ],
+    "snippets": [
+      {
+        "language": "csharp",
+        "path": "./snippets/csharp.code-snippets"
+      }
+    ]
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/microsoft/vscode.git"
+  }
+}

extensions/csharp/package.nls.json

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+{
+	"displayName": "C# Language Basics",
+	"description": "Provides snippets, syntax highlighting, bracket matching and folding in C# files."
+}

extensions/csharp/snippets/csharp.code-snippets

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+{
+	"Region Start": {
+		"prefix": "#region",
+		"body": [
+			"#region $0"
+		],
+		"description": "Folding Region Start"
+	},
+	"Region End": {
+		"prefix": "#endregion",
+		"body": [
+			"#endregion"
+		],
+		"description": "Folding Region End"
+	}
+}