Update 0763.划分字符区间，添加C#

problems/0763.划分字母区间.md

@@ -404,6 +404,32 @@ impl Solution {
     }
 }
 ```
+### C#
+```csharp
+public class Solution
+{
+    public IList<int> PartitionLabels(string s)
+    {
+        int[] location = new int[27];
+        for (int i = 0; i < s.Length; i++)
+        {
+            location[s[i] - 'a'] = i;
+        }
+        List<int> res = new List<int>();
+        int left = 0, right = 0;
+        for (int i = 0; i < s.Length; i++)
+        {
+            right = Math.Max(right, location[s[i] - 'a']);
+            if (i == right)
+            {
+                res.Add(right - left + 1);
+                left = i + 1;
+            }
+        }
+        return res;
+    }
+}
+```
 
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